running extremely lean!!! please help
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running extremely lean!!! please help
hey heres my issue: when i go WOT im perfect but when i let off the gas im hitting 18-20 or LEAN on my PLX wideband... and also it happens when i down shift. or tap the accelorator for a quick second. the funny thing is this only happens this extreme when my lights are on. when i turn them off its not that bad. please help? not sure if my altinator has got something to do with it. thanks for reponses in advance.
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not momentary. it STAYS lean till i pop it outa gear bc its scares me to leave it like that...its never done that b4 till now. im worried that something isnt right. its not like a quick spot of lean its all lean.
side question... what A/F ratio should ur idle be around?
side question... what A/F ratio should ur idle be around?
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hmm my idle is around the high 12s...not that much of an issue there. no when im crusing its fine...i get 13-16 range. pending how i use the gas pedal... but when i go hard and then let off the gas it happens or even sometimes when i down shift. it always happening in declining of rpms.
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^^ agreed unless I'm misunderstanding something here. Your car only needs to be running rich when it's under boost, when it's decelerating it should be running lean as hell. And on initial tip in it might go a little lean momentarily but should be rich well before you build any boost.
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i understand that its saposed to be leaner when decelerateing... thats obvious, but im stating that its even more leaner then it normally has been... like 20s... and till my meter reads LEAN and its not a momentary thing it stays like that ALL the way till i decide to pop in in neutral. hense title...EXTREMELY LEAN.
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ok, it just struck me as odd and out of the ordinary that it would just go crazy lean, i never have seen it like that b4..i just thought it would be too lean. i mean i seen it breifly hit 19s and drop...but this it just stayed lean the whole time.
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Your fine, this is absolutely normal
Under boost you should be in the 10's 11's depending on your setup
Idles should be 13's, cruise the same
When you left off the gas you should be at 20 or LEAN....thats normal
If you go lean in throttle...now thats what u need to worry about
Under boost you should be in the 10's 11's depending on your setup
Idles should be 13's, cruise the same
When you left off the gas you should be at 20 or LEAN....thats normal
If you go lean in throttle...now thats what u need to worry about
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related question
Originally Posted by ROT8TN
You're fine, this is absolutely normal
Under boost you should be in the 10's 11's depending on your setup
Idle should be 13's, cruise the same
When you lift off the gas you should be at 20 or LEAN....thats normal
If you go lean in throttle...now thats what u need to worry about
Under boost you should be in the 10's 11's depending on your setup
Idle should be 13's, cruise the same
When you lift off the gas you should be at 20 or LEAN....thats normal
If you go lean in throttle...now thats what u need to worry about
Dan
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EGTs ~1750 (not under load/boost)
Originally Posted by dhcernese
question: cruising around in 3rd under very light load ~2500rpm, my AFR goes to 15-16 and the EGT rises accordingly. Throttle (lower AFR) or lifting (lean) lowers the EGT. Is this an issue with my map or a normal situation also?
#21
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Originally Posted by dhcernese
No comments? I'm thinking this is normal, but the EGTs near 1750 make me uncomfortable. I had no idea how hot things could get coasting.
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may be ok
Originally Posted by GoodfellaFD3S
I think that's too hot. I'll see 1500 degrees max at cruise. I'd be worried about harming your apex seal springs at that temp......where is your egt probe placed? Mine is about 6 inches down the downpipe, if yours is in the manifold that may account for the temp difference.
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eventually
Originally Posted by rynberg
Why don't you richen up the cruising range to 14-15 and see how your EGTs change?